MoreThanACalculators
Tech & Internet Tools
Practical tools for networking, time zones, QR/barcodes, random generators, display checks, and quick converters. Use the categories below to find what you need in seconds.
Tip: Try “IPv6”, “PPD”, “error correction”, “team”, or “decimal to octal”.
Networking Tools
Subnet planning, addressing, and quick network checks.
QR & Barcode Tools
Create codes, tune QR error correction, and generate scannable labels.
Random & Generators
Pick random numbers, split groups, and generate teams fast.
Time & Date Tools
Convert time zones, calculate durations, and count days.
Quick Converters
Useful conversions for daily tech tasks: units, number bases, and text casing.
Display & Devices
Helpful checks for screens and visual clarity.
Popular Tech & Internet Tools
These are the most-used tools people typically start with.
Tech & Internet Tools FAQ
Quick answers to the most common questions.
What does a subnet calculator show?
It typically shows network address, broadcast, usable host range, and the number of hosts for a given IP and CIDR/subnet mask.
What’s the best QR error correction level?
Use higher error correction when you expect damage/printing issues, and lower levels when you want smaller, simpler QR codes.
How accurate are time zone conversions?
They’re accurate as long as you pick the correct zones and dates (DST changes can shift results on specific days).
What is Screen PPD used for?
PPD (pixels per degree) helps compare perceived sharpness at a viewing distance—useful for monitors, VR, and display planning.
Can I use these tools for work?
Yes—these tools are built for quick checks and planning. For production decisions, always double-check requirements and standards.
More tech calculators
Further tools in this category that were not listed above.
File Size Converter
Convert bytes, KB, MB, GB and TB.
Ping Calculator
Latency estimate from distance and network hops.
Password Entropy Calculator
Password strength in bits from length and character set.
UUID Generator
Generate random version 4 UUIDs.
Unix Timestamp Converter
Convert Unix timestamps to dates and back.
JSON Formatter
Format, validate and minify JSON.
Base64 Encoder Decoder
Encode text to Base64 or decode it.
Binary to Decimal Converter
Convert binary to decimal and hexadecimal.
Password Strength Checker
Rate a password and estimate crack time.
Random Password Generator
Generate strong random passwords.
What the tech and internet tools cover
This section collects the small utilities that developers, IT staff and everyday users reach for several times a week: subnet maths, encoders, generators and quick checks. Everything runs in your browser and nothing you type is sent to a server, which matters for passwords, tokens and internal addresses. The tools fall into five groups.
Networking
The IPv4 subnet calculator turns an address and prefix into the network, broadcast, usable range and mask, and the IPv6 subnet calculator does the same for /64s and larger allocations. The ping calculator estimates the latency you can expect over a given distance and number of hops, which helps separate a slow link from a slow server. The data rate converter and file size converter settle the recurring confusion between megabits and megabytes.
Passwords and identifiers
The password generator produces strong passwords to a chosen length and character set, the strength checker rates one you already have, and the entropy calculator gives the bits of entropy behind both. The UUID generator creates version 4 identifiers for databases and APIs.
Encoding and data formats
The Base64 encoder and decoder converts text and small files for embedding in JSON, email or data URLs. The JSON formatter pretty-prints, validates and minifies JSON. Number bases are handled by the hex to binary, binary to decimal and decimal to octal converters, and the lowercase and uppercase converters fix text casing in bulk.
Codes and randomness
The QR code generator and barcode generator create scannable images from text or URLs, and the error correction level calculator explains how much damage each QR level tolerates. The random number generator, team generator and group splitter handle draws, raffles and classroom groups.
Time and display
The Unix timestamp converter turns epoch seconds into readable dates and back, the time zone converter schedules calls across offices, and the time calculator and day counter add up durations and deadlines. The screen PPD calculator tells you how sharp a monitor looks from a given distance, and the unit converter covers everything else.
Using the tools safely
- Nothing leaves your browser. The generators and encoders work entirely in JavaScript, so you can paste internal IP ranges or real passwords without them being logged.
- Base64 is not encryption. It is a reversible encoding; anyone can decode it. Use it for transport, not secrecy.
- Prefer length over complexity. A 16-character password of random letters beats an 8-character one with symbols by a factor of billions in entropy.
- Check the subnet twice. A /24 has 254 usable hosts, a /23 has 510; off-by-one prefix errors are the usual cause of an unreachable gateway.
A typical task
Setting up a small office network: the IPv4 subnet calculator carves a /26 for workstations and a /28 for printers from a /24, the random password generator creates the Wi-Fi and admin passwords, the entropy calculator confirms they are strong enough, the QR code generator prints the guest Wi-Fi credentials for the reception desk, and the time zone converter fixes the maintenance window with the overseas support team.